參數(shù)資料
型號: μPD784035(A)
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16 位單片微控制器)
中文描述: 8 / 16位單片機微控制器(8 / 16位單片微控制器)
文件頁數(shù): 49/90頁
文件大?。?/td> 402K
代理商: ΜPD784035(A)
μ
PD784035(A), 784036(A)
49
9. LOCAL BUS INTERFACE
The local bus interface enables the connection of external memory and I/O devices (memory-mapped I/O). It
supports a 1M-byte memory space. (See
Figure 9-1
.)
Figure 9-1. Example of Local Bus Interface
Data bus
Latch
Gate array for I/O
expansion including
Centronics interface
circuit, etc.
RD
WR
REFRQ
AD0-AD7
ASTB
Pseudo SRAM
PROM
PD27C1001A
μ
PD784036(A)
μ
A16-A19
Address bus
A8-A15
D
Kanji character
generator
PD24C1000
μ
9.1 Memory Expansion
By adding external memory, program memory or data memory can be expanded to one of seven sizes between
256 bytes and approximately 1M byte.
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